| McDonough to Opwijk | 4,400.09 mi (7,081.26 km) |
| McDonough to Ostend | 4,342.48 mi (6,988.54 km) |
| McDonough to Oud-Heverlee | 4,423.07 mi (7,118.24 km) |
| McDonough to Oud-Turnhout | 4,423.39 mi (7,118.76 km) |
| McDonough to Oudenaarde | 4,379.35 mi (7,047.88 km) |
| McDonough to Oudenburg | 4,346.77 mi (6,995.46 km) |
| McDonough to Oupeye | 4,465.83 mi (7,187.07 km) |
| McDonough to Overijse | 4,418.95 mi (7,111.61 km) |
| McDonough to Overpelt | 4,443.35 mi (7,150.89 km) |
| McDonough to Paal | 4,438.18 mi (7,142.56 km) |
| McDonough to Peer | 4,447.03 mi (7,156.80 km) |
| McDonough to Pepinster | 4,476.62 mi (7,204.43 km) |
| McDonough to Peruwelz | 4,387.00 mi (7,060.19 km) |
| McDonough to Perwez | 4,434.49 mi (7,136.62 km) |
| McDonough to Philippeville | 4,434.68 mi (7,136.93 km) |
